Call or visit one of our clinics:
Darlinghurst Centre
St Vincent's Hospital
Victoria St
Darlinghurst NSW 2010
Ph: 1300 134 327
Fax: (02) 8382 3092
Double Bay Centre
4/5 Goldman Lane
(Between Knox St and Knox Lane)Double Bay NSW 2038
Ph: (02) 9327 3908
Fax: (02) 8382 3092
13. Noise Levels Exposure Length: For every 3dB louder, the sound is twice as strong so the exposure time should halve.
14. iPods Safe exposure limit is 85 decibels for eight hours a day. 100dB = 15min Cory Portnuff/Dept. of Speech, Language and Hearing Science, University of Colorado; Brian Fligor/Children's Hospital Boston and Harvard Medical School
15. iPod listening time vs % volume Cory Portnuff/Dept. of Speech, Language and Hearing Science, University of Colorado; Brian Fligor/Children's Hospital Boston and Harvard Medical School
Impulse noise is a one off loud sound Acoustic trauma normally occurs at levels greater than a 140 dB A weighting for the way human perceive mid range continuous sounds (60dB equal loudness curve) C weighting for the way humans perceive impluse (very loud) sounds (80dB flatter on equal loudness curve) LC = 140dB
For example, aeroplane is 120dB at 25 metres away. DISTANCE : This is a result of the inverse square law.
This is the world health organisation recommendations As the sound level increases 3dB the exposure length halves.
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